Apparatus for making containers of paper and the like.



F. E. NEUBERT.

APPARATUS FOR MAKING CONTAINERS OF PAPER AND THE LIKE.

APPLICATION FILED AUG-5| I916- RENEWED JULY 24. 19:1.

1fi81l o Patented. Nov. 27/, 19170 6 SHEETSSHEET 1.

F. E. NEUBERT.

APPARATUSFOR MAKING CONTAINERS OF PAPER AND THE LIKE. APPLICATIQN FILED AUG-5. 191s. RENEWED JULY 24.1911.

Patented Nov. 27, 1917.

6 SHEETS-SHEET 2- FE. Mulbert.

F. E. NEUBERT.

APPARATUS FOR MAKING CONTAINERS OF PAPER AND THE LIKE.

APPLICATION FILED AUG-5.1916. RENEWED JULY 24.1917.

1 %@8 3@1 v Patented. Nov. 27, 1917.

6 SHEETS-SHEET 3.

Jvvvzm Uoz/ FE Neubert.

F. E. NEUBERT.

APPARATUS FOR MAKING CONTAINERS OF PAPER AND THE LIKE. APPLICATION FILED was, 1916. RENEWED JULY 24.1911.

1 fiwfim Patentd. Nov 27/, 1917.

6 SHEETS-SHEET 4-- F. E. NEUBERT.

APPARATUS FOR MAKING CONTAINERS OF PAPER AND THE LIKE.

APPLICATION FILED AUG-5| I916- RENEWED JULY 24' l9l7.

Patented Nov, 27, 191?.

o 6 HEET HE 5 8140mm FEMubert.

F. E. NEUBERT. v

APPARATUS FOR MAKING' CONTAINERS OF PAPER AND THE LIKE.

APPLICATION FILED Aue.5. 1916- RENEW'ED JULY 24. 1917.

L wfillc Patented. Nov. 2?, 1917.

6 SHEETS-SHEET 6- KWW F." ENeubefi mun earns PATENT ornrcn FRITZ EUGEN NEUBERT, 0F PENIG, GERMANY, ASSIGNOR T0 GESELLSCHAFT Emit PAPIERHOHLKfiRPER UNI) MASGHINENANLAGEN M. B. H., 0F PENIG, GERMANY.

APPARATUS FOR MAKING CONTAINERS OF PAPER AND THE LIKE.

Specification of Letters Patent.

Patented Nov. 27, iltbil'it,

Application filed August 5, 1916, Serial No. 113,404. Renewed July 24, 1917. Serial No. 182,583.

To all whom it may concern:

Be it known that I, FRrrz EUGEN NEU- BERT, subject of the Emperor of Germany, residing at Penig, Saxonia, Post-Strasse N o. 6, Germany, have invented certain new and useful Improvements in Apparatus for Making Containers of Paper and the like, of which the following is a specification.

This invention relates to an improved apparatus for making containers of paper and the like by precipitating a layer of pulp capable of being pressed onto amold pervious to water and subsequently couching the fibrous layer in an outer casing surrounding the mold.

A novel feature of the apparatus consists in the arrangement of means for sucking the water out of the mold, after the termination of the time allowed for the precipitation, at the same time as the superfluous pulp-water, in order to prevent the layer of precipitated pulp from being injured by water subsequently entering into the interior of the mold, this being preferably efi'ected by such dimensions of the pipes, valves and the like that the water-level in the mold falls more rapidly than the level of the pulp- Water outside the mold, so that water passes more readily inward than outward.

The trough containing pulp-water is preferably preventedfrom being completely emptied by providing a connecting pipe which opens at the bottom of the permeable mold in the trough and admits air at the correct time into the suction pipe, thereby rendering the latter inoperative. Further, when there are several molds or sieves their connecting pipes and the suction pipe are preferably so laid that the pipes connecting the insides of the .moldsremain filled; the

. molds are thereby separated from one another and independent regulation of the successive operations in the individual molds is possible.

An important part ofthe improved apparatus is abox, into which the various pipes for supplying and leading away the plup-water as well as those for the suction open, and at which are provided the requisite automatic and manually-operated valves for regulating the plant The press for pressing the paper mass comprises an outer casing for taking up the pressure and a removable inner fitting, consisting of one or more pieces of sheet metal, which fit tightly in the easing, while when the fitting is pushed out the pieces, in case several of them are provided, are elastically spread apart, so that the paper body is released.

preferably Other important features of the presses Furthermore the fitting pieces may preferably be provided with any desired inscriptions and ornamentations for making impressions in the paper bodies to be made.

An important feature of the couching and pressing device is an arrangement by which the water is pressed out with a constantly increasing pressure in individual stages separated by periods of zero pressure; the water contained in the layer is thereby given time to be distributed during the periods free from pressure, and the formation of veins of water in the layer of paper leading to the perforations and joints of the fitting pieces is prevented. The device for automatically obtaining this change of pressure preferably comprises one or more valves which are loaded by weight-carriers having a variable load and thereby allow the excess pressure medium at any required pressure to escape. The weight-carriers are preferably formed as levers having sliding weights moved by cams, and the interruptions of pressure are preferably obtained by means of relieving bars which lift the sliding weights'at predetermined places from their levers. J

The invention consists v in the operations and in the construction,

arrangement and combination of parts described hereinafter tainers of paper and the like is diagram- I (Figs. 1 and 2) pipe 4 opens.

matically represented by way of example in the accompanying drawing, wherein:

Figure 1 is a longitudinal section showing the arrangement of the principal constituent parts of the apparatus,

Fig. 2 is a like section taken through .the pipe box,

Fig. 3 is a like section taken through the closed couching mold,

Fig. 4 is a like section taken through the open mold,

Fig. 5 is a horizontal section taken through the opened fitting of the mold;

Fig. 6 is an elevation, partly in section, showing the pressure-changing device for; the presses,

Fig. 7 is a Fig. 8 is a top plan upper part thereof.

Referring to the drawing, the pulp-water trough 1 contains the molds or sieves 2, on which the pulp suspended in the pulp-water is precipitated owing to the water being sucked through the sleves by a pipe 3. By opening the valve 5 the trough can be emptied through the discharge pipe 4 after the, pulp-Water has been sucked away through the suction pipe 3- to level with the tops of the molds, this pipe 3 being then horizontal section thereof, and view showing the closed.

For working the pipes correctly a box 6 is provided, into which the A pulp pipe 7 leading to the trough 1 opens into this box, and also a pipe 8 which leads to the chambers in the molds and is connected therewith by branches 9; the end of this pipe 8 in the box 6 is normally closed by a check valve 10 which carries a float 11 for counterbalancing part of its weight. The cover 6 of the box carries a double-acting valve 12, 13, the disk 12 being seated by atmospheric pressure and the disk 13 by the pressure in the box 6, the valve being partially balanced by a float 14. A pipe 15 also opens into the box 6 and connects it with the trough 1 at the level of the bottom edge of the molds; this pipe is also provided with a check valve, so that the contents of the box cannot flow to the pulp-water trough 1.

The apparatus described as follows After a layer of pulp has been precipitated on the molds 2 by means of the pipe 3, the box 6 is filled with pulp-water and the discharge pipe 4 exercises a suction action under the action of gravity; the superfluous pulp-water consequently flows out of the trough 1 through the pipe 7 to the box 6. The check valve 10 of the pipe 8 is simultaneously opened by the suction action, and the water inside the molds is also sucked away and, when the sections of the pipes are equal, the water-level sinks more quickly in the molds than outside the so far operates same in the trough 1, because there is less water in the molds than outside the same. As soon as the level of the pulp-water has reached the lower edge of the molds the mouth of the pipe 15 in the trough 1 is opened, air enters into the box 6, the column of water in the discharge pipe4 breaks and the suction action ceases.

The position of the pipe 8 is such that when the suction action ceases, the branch pipes 9 which lead from the ipe 8 to inside the molds remain partly lled, so that the chambers in the various molds 2 remain separated from one another and can be dealt with further individually.

The precipitated layers of pulp are couched by the molds 2 in the casings 17 suspended on a traveling crane 16; after a mold 2 has been covered by a casing 17 a pressure medium, e. g. compressed air, is supplied directly by a pipe 30 (Fig. 6) into the mold, or a rubber bag in the mold is expanded, whereby the water is pressed out of the loose layer of paper pulp covering the mold, a varying pressure being applied several times as described hereinafter; the precipitated layers are then lifted together with the casings 17, from the molds 2. The valve 5 is then closed and the valve 18 of the pulp-supply pipe 19 is opened, so that the paper pulp enters into the box 6 through the top part of the pipe 4 and by lifting the valve 12, 13 enters into the box 20 mounted on the box 6. The float 14 is hereby lifted and the valve 12, 13 with it, so that its lower disk 13 is seated against the cover of the box 6. The pulp-water flows through the pipes 19 and 4 to the box 6 and the trough l and fills the latter, whereupon the valve 18 is closed. The described cycle of operations then begins again.

The couching mold shown in Figs. 3 to 5 comprises a casing 17 suspended from a traveling crane 16 and a fitting 21. This fitting 21 comprises four sheet metal pieces attached at their upper ends to four central members 22 which are slidably mounted at a common plate 23 with which they can be removed from the casing 17 by means of a toothed rack or a spindle 23 to which the common plate 23 is fixed. The central members 22 and the common plate 23 are conical at their outer surfaces and are surrounded by a support 24 having a conical bore at its under side which support 24 in a bore of its upper part takes up the spindle 23 and a surrounding spiral s ring 23 adapted to raise the spindle wit the fitting by pressing against an upper piston 23 fixed at the spindle 23,. The slidable connection between the central members 22 and the common plate 23 is effected by bolts 25 of the latter engaging with radial T- shaped slots 26 at the upper side of the central members 22. Two crosswise radially arranged spiral springs 27 serve to press the central members 22 and the adoined fittings 21 outward to contact in hooks 28 linked at a traverse 28 which is mounted on the said platform 28 and which has a central hole for allowing a pressing spindle (not shown) of the crane to freely pass and exert a pressure on the piston 23 of the spindle 23 in order to free the perfectly pressed paper container of the fittings 21 after all processes have been completed. The hooks 28 allow to take the fitting 21 wholly out of the mantle casing or mold 17 if another fitting is-to be used, as later mentioned.

At the under edge of the fittings 21 and at their outer faces are attached annular ring sections 21 havingeach a tap 21 at one end and a hole at the other end for centering themselves against each other during their radial movements.

The fittings 21 are pierced by perforations 29 joined with each other by small grooves 29 drawn in an oblique direction in the outer face of the fittings 21, and in the inner face of th? mold casing 17 are cut vertical grooves 29 which in combination with the perforations 29 and the small grooves 29 allow the water pressed out of the adjacent layer of pulp to flow away.

The fittings 21 are preferably made of sheet steel or aluminium or a similar material, and they can be readily provided on their inner faces with ornamentations and inscriptions, such as are to be impressed in the paper vessel; also, strengthened edges or ribs of the paper container can be produced in this manner.

A mold with a sole rigid fitting can be used for making small thin-walled articles. In this case after the paper layer has been pressed the fittings 21 and the paper bodies are taken out of the mantles 17 as above mentioned and dried in a drying chamber, the paper bodies thereby become free and fall out of the molds 21.

The device for producing the change of shown in Figs. 7 to 9. It comprises an overflow box 31 into Which the pipe 30 for supplying the pressure medium for couching opens by Way of ports 30 Each of these ports is controlled by an overflow valve 32 ai ing, a spindle 33 passing through the top 34 of the box 31 and loaded above by a lever These levers are fulcrumed' in brackets on the top 34 of the box and each carries a carriage 36 which may contain any desired number of weights. These car- The movement ing so driven through the riages are shifted on the levers 35 by rocking levers 37 which are moved by means of links 38 and levers 39 carrying rollers 40.

is brought about by the rollers 40* which run on cams 41, the latter bemedium of gearing 42, 43, 44, 45 driven by a. countershaft 46 having a fast and loose pulley that the cams 41 rotate one revolution during the time required for one couching operation. The levers 39 having the antifriction rollers 40 are pressed against the cams 41 by a weight 47 whose rope 48 is attached to one of the rocking levers 37.

The shape of the cams 41 is that of a spiral, so that the carriages 36 are gradually pushed along the levers 35, whereby the valves 32 are gradually loaded more and more and the pressure is increased. The peripheries of the cams 41 may be provided with recesses Which cause a temporary lowering of the pressure; in the present case auxiliary rails 49 are arranged beside the levers 35, the same being attached by means of brackets 50 in the top 34 of the box. These auxiliary 'rails 49 have projections 51, on to which the rollers 52 of the carriages 36 run, and when the carriages pass over these places the levers 35 are relieved,

so that the valves 32 are released and the 05-O200-5002000 kg. per sq. cm.

Several valves 32 are arranged instead of only one in order to render the jamming of a valve less injurious and to improve the capability of regulation.

The cams 41, auxiliary rails 49 and the load carried by the carriages 36 are exchangeable, so that the apparatus can be readily adapted to all the working conditions as regards the thickness and other features of the layer of paper to be couched.

I claim:

1. In an improved apparatus for making containers of paper and the like by pre cipitating a layer of pulp onto a mold the combination with a trough for pulp water and a plurality of hollow molds pervious to water therein, of a sucking device, a pipe connecting the said sucking device with the interior of the molds, a second pipe connecting the trough with the same sucking device or with another simultaneously act ing sucking device, and means for couching layers of pulp precipitated on the molds.

2. In an improved apparatus for making containers of paper and the like by preinterior of the molds, a second pipe connecting the trough with the same sucking device or with another simultaneously acting sucking device, means for couching layers of pulp precipitated on the molds, and such an arrangement of valves in the pipes or such dimensions of the pipes relatively to the dimensions of the trough and of the interior of the molds, that the level of water in the molds is caused to sink more rapidly than that of the pulp water.

3. In an improved apparatus for making containers of paper and the like by precipitating a layer of pulp onto a mold the combination with a trough for pulp water and plurality of hollow molds pervious to water therein, of a sucking device, a pipe connecting the said sucking device with the interior of the molds, a second pipe connecting the trough with the same sucking device or with another simultaneously acting sucking device, means for couching layers of pulp precipitated on the molds, and a pipe connecting the sucking pipe with the trough in the level of the bottom of the molds .for automatically stopping the suction at this point.

4. In an improved apparatus for making containers of paper and the like by precipitating a layer of pulp onto a mold the combination with a trough for pulp water and a plurality of hollow molds pervious to water therein, of a sucking device, a pipe connecting the said sucking device with the interior of the molds,- a second pipe connecting the trough with the same sucking device or with another simultaneously acting'sucking device, means for couching layers of pulp precipitated on the molds, andsuch an arrangement of valves in the pipes or such dimensions of the pipes relatively to the dimensions of the trough and of the interior of the molds, that the level of water in the molds is caused to sink more rapidly than that of the pulp water, and a pipe connecting the sucking pipe with the trough in the level of the bottom of the molds for automatically stopping the suction at this point.

5. In apparatus for making containers of paper pulp and the like, the combination with a trough for pulp-water and a plurality of hollow molds pervious to water therein, of a closed box, a pulp-water pipe connecting the box with the trough, a discharge or suction pipe opening into the box, a pulp-water supply pipe opening into the box, a connecting pipe connecting the box with the interior of the molds, a check valve in the box controlling the one end of the connecting pipe, and a pipe having one end opening in the trough on a level with the bottom of the molds and its other end open ing into the box, a check valve in the latter pipe, a double acting valve mounted inthe fiuous pulp-water from the trough and water from the interior of the molds, and means for pressing layers of pulp precipitated on the molds, said means comprising a strong outer casing for each mold, a perforated fitting normally in each casing, and means for supplying a medium under pressure to the interior of the molds carrying layers of pulp located in the fittings.

7. In apparatus for making containers of paper pulp and the like, the combination with a trough for pulp-water and a plurality of hollow molds pervious to water therein, of a system of pipes comprising a closed box having a double acting valve in the top thereoffor supplying pulp-water to the trou h and for draining away superfiuous u p-water from the trough and water from the interior of the molds, and means for pressing layers of pulp precipitated on the molds, said means comprising a strong outer casing for each mold, a fitting normally in each casing and means for supplying a medium under pressure to the interior of the molds carrying layers of pulp located in the fittings, each fitting comprising a plurality of sheet pieces movably connected together.

8. In apparatus for making containers of paper pulp and the like, the combination with a trough for pulp-water and a plurality of hollow molds pervious to water therein, of a system of pipes comprising a closed box having-a double acting valve in the top thereof for supplying pulp-water to the trough and for draining away superfluous pulp-water from the trough and water from the interior of means for pressing layers of pulp precipitated on the molds, said means comprising a strong outer casing for each 7 mold, a fitting normally in each casing and means for supplying a medium under pressure to the interior of the molds carryin layers of pulp located in the fittings, each being adapted to fit snugly into its casing and comprising a plurallt of sheet pieces, a common plate guiding t e sheet pieces in a radial direction, corneal central portions of the sheet pieces, an outer conus surrounding the said'conical portions and springs pressing the conical portions and sheet pieces outward to contact with t e uter casings,

the molds, and

9. In apparatus for making containers of paper pulp and the like, the combination with a hollow mold pervious to water and means for forming a layer of pulp thereon, of means for pressing the layer of pulp on the mold, said latter means comprising an outer casing, a sectional lining in the casing, a head to which the lining sections are secured, means for moving the lining longitudinally in the casing, means when said lining is moved longitudinally to cause the sections to open, and meansfor supplying a medium under pressure to the interior of the mold.

10. In an apparatus for making paper containers, th combination of a trough, a plurality of stationary hollow molds mounted in the trough, means for precipitating a layer of pulp on the molds, means for sucking the liquid from the molds and trough, means for causing the liquid to be drawn from the molds more rapidly than that of the water from the pulp, and means cooperating with the molds for couching the pulp on said molds.

11. In apparatus for making containers of paper pulp and the like, the combination with a hollow mold pervious to Water, means for forming a layer of pulp thereon, and an outer casing for surrounding the mold carrying the layer of pulp, of means for supplying a medium under pressure to the interior of the mold, said means comprising a pressure medium supply pipe, a valve controlling the latter and a member adapted to carry a variable load pressing on the valve.

12. In apparatus for making containers of paper pulp and the like, the combination With a hollow mold pervious to Water, means for forming a layer of pulp thereon, and an outer casing for surrounding the mold carrying the layer of pulp, of means for supplying a medium under pressure to the interior of the mold, said means comprising a pressure-medium supply pipe, a

valve controlling the latter, a lever carried by the valve, a carriage for weights movable along the lever, and camoperated means for shifting the carriage along the lever.

13. In apparatus for making containers of paper pulp and the like, the combination with a hollow .mold pervious to water,

means for forming a layer of pulp thereon, and an outer casing for surroundingthe mold carrying the layer of pulp, of means for supplying a medium under pressure to the interior of the mold, said means comprising a pressure-medium supply pipe, a valve controlling the latter, a lever carried by the valve, a carriage for Weights movable along the lever, an auxiliary rail adjacent to the lever, said rail having projections adapted to lift'the carriage ofi' the lever when passing over the same, and camoperated means for shifting the carriage along the lever,

14. In an apparatus for making paper containers, the combination of a trough, a plurality of stationary hollow molds mountedin the trough, means for precipitating a layer of pulp on the molds, means forsucking the liquid from the molds and trough, a track above the trough, a carriage operable on the track, a plurality of compressing members carried by the carriage and cofipcrating with the molds, and meansv for supplying a medium under pressure to the interior of the molds.

15. In an apparatus for making paper containers, the combination of a trough, a plurality of stationary hollow molds moun ed in the trough, meansfor precipitating a layer of'pulp on the molds, means for sucking the liquid from the molds and trough, a track above the trough, a carriage operable on the track, a plurality of compressing members carried by the carriage and coiiperating with the molds, and means for supplying a medium under variable pressure to the interior of the molds.

16. In an apparatus for making paper containers, the combination of a trough, a plurality ofstationary hollow molds mounted in the trough, means for precipitating a layer of pulp on the molds, means for sucking the liquid from the molds and trough, a track above the trough, a plurality of compressing members movably supported above the trough and cooperating with the molds, each compressing member comprising a cas-, ing, a section lining movably mounted in the casing, a head to which the lining sections are secured, means for operating the head to move the lining within the casing to open the sections thereof, and means for supplying a medium under pressure to the interior of the molds.

17. In an apparatus for making paper containers, the combination of a trough, a plurality of stationary hollow molds mounted in the trough, means for precipitating a layer of pulp on the molds, means for removing the liquid from the trough and hollow molds, said means including means for causing the level of the Water to fall more rapidly in the molds than in the trough, a plurality of compressing members mount ed above the trough and cooperating with the molds, and means for supplying a medium under pressure to the interior of the.

molds during the molding operation.

18. In an apparatusfor making paper containers, the combination of a trough, a

plurality of stationary hollow molds mounted in the trough, means for precipitating a layer of pulp on the molds, suction means for sucking the water from the molds and trough including a tank and valves, a pipe communicatin with the trough at or about the level 0 the bottom thereof and the tank for automatically stopping the suction action, a plurality of compressing members located above the trough to cooperate with the molds, and means for supplying amedium under pressure to the interior of the molds during the molding operation.

19. In an apparatus for making paper containers, the conbination of a trough, a

V plurality of stationary hollow molds mounted in the trough, means for precipitating a layer of pulp on the molds, means for removing the water from the trough and molds, a plurality of compressing members mounted above the trough, each compressing member comprising a casing, a sectional lining in the casing, a conical head to which the sections of the lining are secured, springs for normally pressing the lining sections against the walls of the casing, and spring actuated means for normally holding the lining drawn up in the casing, and adapted when operated to move the lining longitudinally in the casing to spread the sections apart.

In testimony whereof I aifix my signature in presence of two witnesses. FRITZ EUGEN NEUBERT.

Witnesses: I

LEO BERGHoLz,

BERToLD A. BRAUN. 

